Annelids | animals

Annelids or segmented worms are bilateral, to move they contract their segments. Their nervous system can have a single or double nerve cord with an enlarged region. Their digestive system they have an unsegmented gut that runs through the middle of it's body.Their excretory system uses nephridia which removes solid waste. their circulatory system is a closed system which allows the blood to circulate through a closed network of blood vesels. Their respiratory system uses diffusion. they do not have a skeleton. They reproduce sexually but they have both male and female parts, they can also regenerate parts.

Oligochaeta are your average earthworms.

Polychaeta can be a bristle worm.

Hirudinea can be your leeches.